Icy conditions could greet drivers across Norfolk tomorrow morning with the freezing fog returning tonight and temperatures set to drop to minus five.

Chris Bell, forecaster at Weatherquest, based at the University of East Anglia, said: “We are going to have cold temperatures again tonight. The fog and mist, however, might not be as widespread as it was last night.

“Temperatures across the county will be between minus three and minus five and there could be one or two places in the region a little bit colder.

“Norfolk was not the coldest place in the region last night. Temperatures fell to minus three at Marham but we recorded temperatures of minus six in Suffolk.

“The good news with this situation is that it hasn’t rained so the roads are quite dry. But if the fogs develops and becomes more widespread tonight - particularly from the south - than there could be moisture on the ground overnight.

“We’d advice people to take the same caution that they did this morning because there could be slippery surfaces on untreated roads.”

The Met Office had issued a yellow warning of fog for the East of England last night and advised people reduced visibility and the risk of disruption this morning.

Tomorrow, forecasters at the Met Office have said an early frost, mist and freezing fog will greet morning commuters but will clear by the afternoon.

Train passengers travelling from King’s Lynn, Watlington, and Downham Market are still experiencing delays heading to London Kings Cross because of early delays caused by overhead wire problems.

People getting the train from Norwich to Cambridge also experienced delays this morning because of problems at a level crossing and there were also delays until 2pm on services travelling from Cambridge to London Liverpool Street.

Elsewhere, traffic chaos was caused in Norwich city centre after a broken down bus blocked a busy route at around 8.35am.

The bus broke down in Upper King Street, near Tombland, and caused long delays along Magdalen Road and Bull Close Road. The road has now fully reopened.

Meanwhile, a serious single-vehicle accident partially closed the A148 in East Rudham but recovery work helped to clear the road by 11am.

Meanwhile, people from East Anglia planning to fly out of London Heathrow or London City airports are being warned to contact their airlines before travelling.

Thick fog and ice earlier today has caused disruption to flights in and out of some airports..

At London’s Heathrow Airport about 60 flights were cancelled and delays are expected. Six early morning flights were cancelled at London City Airport.

Cancelled flights included scheduled trips to Warsaw, Nice, Stockholm, Aberdeen and several German cities.

At Norwich Airport, flights are running on schedule but flights to and from London Heathrow, London City and Leeds Bradford are still experiencing severe disruptions.

There are also possible delays to flights in and out of Newcastle and Manchester airports.